Oculomotor involvement in myotonic dystrophy type 2.
Ajroud-Driss S, Sufit R, Siddique T, Hain TC.
Davee Department of Neurology and Clinical Neurosciences, Feinberg School of Medicine, Northwestern University, 710 North Lake Shore Drive, Abbott Hall 1426, Chicago, Illinois 60611, USA. s-ajroud@md.northwestern.edu
Oculomotor function has not been studied in patients with myotonic dystrophy type 2 (DM2). We report the presence of rebound nystagmus in seven of eight patients with DM2 in the absence of a structural brainstem or cerebellar lesion. The rebound nystagmus observed in these patients is very suggestive of ocular myotonia, and examination of patients using video-Frenzel goggles may be a useful method for diagnosing myotonia of the extraocular muscles.
PMID: 18785188 [PubMed - indexed for MEDLINE]